食品科学

• 基础研究 • 上一篇    下一篇

聚碳酸酯中双酚A向乙醇溶液中迁移规律和扩散系数研究

曹雪慧,纪淑娟,励建荣   

  1. 1.渤海大学化学化工与食品安全学院,辽宁 锦州 121013;2.沈阳农业大学食品学院,辽宁 沈阳 110866
  • 出版日期:2014-10-15 发布日期:2014-10-17

Diffusion Coefficient and Migration of Bisphenol A from Polycarbonate to Ethanol Solution

CAO Xue-hui, JI Shu-juan, LI Jian-rong   

  1. 1. College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Jinzhou 121013, China;
    2. Food Science College, Shenyang Agricultural University, Shenyang 110866, China
  • Online:2014-10-15 Published:2014-10-17

摘要:

选取聚碳酸酯塑料为研究对象,分析双酚A单体在不同体积分数乙醇溶液中溶出情况,考察其在75、60、40、20 ℃下的迁移行为,在此基础上,计算相应的扩散系数,并对材料基体特征参数Ap值进行估算。结果表明:在相同的加热时间和温度下,乙醇体积分数越高双酚A的迁移率越大;相同体积分数乙醇溶液中,双酚A迁移率随着接触时间的延长、接触温度的升高而增加;双酚A向溶液中的扩散系数(DP)大小依次为95%乙醇>65%乙醇>15%乙醇>蒸馏水,根据DP从而估算聚碳酸酯的基体特征参数Ap值范围为-1.02~7.54。

关键词: 聚碳酸酯, 扩散系数, 双酚A, 乙醇, 迁移

Abstract:

The migration behavior of bisphenol A monomer from polycarbonate plastic container to ethanol solution at
various concentrations was studied at 75, 60, 40 and 20 ℃. The diffusion coefficients were calculated. The polymer specific
Ap-values were also estimated. The results showed that the migration of bisphenol A increased with an increase in ethanol
concentration at the same heating time and temperature, and was positively related to contact time and temperature at the
same ethanol concentration. The diffusion coefficient DP of bisphenol A in different solvent media followed the decreasing
order: 95% ethanol, 65% ethanol, 15% ethanol, and distilled water. According to the DP, the polycarbonate specific Ap-values
were estimated in the range of -1.02 to 7.54.

Key words: polycarbonate, diffusion coefficient, bisphenol A, ethanol, migration

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